Class One.
The process of bringing heaven down to earth involves three steps: 1) setting up the possibility (inheritance, Bracha), 2) actually doing it (toiling in Torah, doing Mitzvos), 3) the reward (gift beyond our possibility, the reward of the Mitzvah is the connection itself).
When Moshe sets up the work and when Yehoshua sets up this work.
Class Two.
This מאמר Why does Moshe send the spies, considering that God left it Him,
He does so because he appreciates the need to provide a new נתינת כח for the entry into ארץ ישראל.
But it doesn’t work out and יהושע brings them into ארץ ישראל and he sends the spies.
Had Moshe send the spies to empower the Yidden to be צדיקים, but since יהושע sends the מרגלים Yidden are empowered to be בינונים and no more.